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整理鼠标解读代码
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@yourtion
yourtion committed Apr 11, 2016
1 parent 862d440 commit 8d21f13
Showing 1 changed file with 114 additions and 94 deletions.
208 changes: 114 additions & 94 deletions 08_day/bootpack.c
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Original file line number Diff line number Diff line change
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#include <stdio.h>

extern struct FIFO8 keyfifo, mousefifo;
void enable_mouse(void);

struct MOUSE_DEC {
unsigned char buf[3], phase;
};

void init_keyboard(void);
void enable_mouse(struct MOUSE_DEC *mdec);
int mouse_decode(struct MOUSE_DEC *mdec, unsigned char dat);

void HariMain(void)
{
struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
char s[40], mcursor[256], keybuf[32], mousebuf[128];
unsigned char mouse_dbuf[3], mouse_phase;
int mx, my, i;

init_gdtidt();
init_pic();
io_sti(); /* IDT/PICの初期化が終わったのでCPUの割り込み禁止を解除 */

fifo8_init(&keyfifo, 32, keybuf);
fifo8_init(&mousefifo, 128, mousebuf);
io_out8(PIC0_IMR, 0xf9); /* PIC1とキーボードを許可(11111001) */
io_out8(PIC1_IMR, 0xef); /* マウスを許可(11101111) */

init_keyboard();

init_palette();
init_screen8(binfo->vram, binfo->scrnx, binfo->scrny);
mx = (binfo->scrnx - 16) / 2; /* 计算画面中心坐标 */
my = (binfo->scrny - 28 - 16) / 2;
init_mouse_cursor8(mcursor, COL8_008484);
putblock8_8(binfo->vram, binfo->scrnx, 16, 16, mx, my, mcursor, 16);
sprintf(s, "(%d, %d)", mx, my);
putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, s);

enable_mouse();
mouse_phase = 0; /* 进入到等待鼠标的0xfa的状态 */

for (;;) {
io_cli();
if (fifo8_status(&keyfifo) + fifo8_status(&mousefifo) == 0) {
io_stihlt();
} else {
if (fifo8_status(&keyfifo) != 0) {
i = fifo8_get(&keyfifo);
io_sti();
sprintf(s, "%02X", i);
boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 0, 16, 15, 31);
putfonts8_asc(binfo->vram, binfo->scrnx, 0, 16, COL8_FFFFFF, s);
} else if (fifo8_status(&mousefifo) != 0) {
i = fifo8_get(&mousefifo);
io_sti();
if (mouse_phase == 0) {
/* 等待鼠标的0xfa的状态 */
if (i == 0xfa) {
mouse_phase = 1;
}
} else if (mouse_phase == 1) {
/* 等待鼠标的第一字节 */
mouse_dbuf[0] = i;
mouse_phase = 2;
} else if (mouse_phase == 2) {
/* 等待鼠标的第二字节 */
mouse_dbuf[1] = i;
mouse_phase = 3;
} else if (mouse_phase == 3) {
/* 等待鼠标的第三字节 */
mouse_dbuf[2] = i;
mouse_phase = 1;
/* 鼠标的3个字节都齐了，显示出来 */
sprintf(s, "%02X %02X %02X", mouse_dbuf[0], mouse_dbuf[1], mouse_dbuf[2]);
boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 32, 16, 32 + 8 * 8 - 1, 31);
putfonts8_asc(binfo->vram, binfo->scrnx, 32, 16, COL8_FFFFFF, s);
}
}
}
}
struct BOOTINFO *binfo = (struct BOOTINFO *) ADR_BOOTINFO;
struct MOUSE_DEC mdec;
char s[40], mcursor[256], keybuf[32], mousebuf[128];
int mx, my, i;

init_gdtidt();
init_pic();
io_sti(); /* IDT/PICの初期化が終わったのでCPUの割り込み禁止を解除 */

fifo8_init(&keyfifo, 32, keybuf);
fifo8_init(&mousefifo, 128, mousebuf);
io_out8(PIC0_IMR, 0xf9); /* PIC1とキーボードを許可(11111001) */
io_out8(PIC1_IMR, 0xef); /* マウスを許可(11101111) */

init_keyboard();

init_palette();
init_screen8(binfo->vram, binfo->scrnx, binfo->scrny);
mx = (binfo->scrnx - 16) / 2; /* 计算画面中心坐标 */
my = (binfo->scrny - 28 - 16) / 2;
init_mouse_cursor8(mcursor, COL8_008484);
putblock8_8(binfo->vram, binfo->scrnx, 16, 16, mx, my, mcursor, 16);
sprintf(s, "(%d, %d)", mx, my);
putfonts8_asc(binfo->vram, binfo->scrnx, 0, 0, COL8_FFFFFF, s);

enable_mouse(&mdec);

for (;;) {
io_cli();
if (fifo8_status(&keyfifo) + fifo8_status(&mousefifo) == 0) {
io_stihlt();
} else {
if (fifo8_status(&keyfifo) != 0) {
i = fifo8_get(&keyfifo);
io_sti();
sprintf(s, "%02X", i);
boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 0, 16, 15, 31);
putfonts8_asc(binfo->vram, binfo->scrnx, 0, 16, COL8_FFFFFF, s);
} else if (fifo8_status(&mousefifo) != 0) {
i = fifo8_get(&mousefifo);
io_sti();
if (mouse_decode(&mdec, i) != 0) {
/* 3字节都凑齐了，所以把它们显示出来*/
sprintf(s, "%02X %02X %02X", mdec.buf[0], mdec.buf[1], mdec.buf[2]);
boxfill8(binfo->vram, binfo->scrnx, COL8_008484, 32, 16, 32 + 8 * 8 - 1, 31);
putfonts8_asc(binfo->vram, binfo->scrnx, 32, 16, COL8_FFFFFF, s);
}
}
}
}
}

#define PORT_KEYDAT 0x0060
#define PORT_KEYSTA 0x0064
#define PORT_KEYCMD 0x0064
#define KEYSTA_SEND_NOTREADY 0x02
#define KEYCMD_WRITE_MODE 0x60
#define KBC_MODE 0x47
#define PORT_KEYDAT 0x0060
#define PORT_KEYSTA 0x0064
#define PORT_KEYCMD 0x0064
#define KEYSTA_SEND_NOTREADY 0x02
#define KEYCMD_WRITE_MODE 0x60
#define KBC_MODE 0x47

void wait_KBC_sendready(void)
{
/* 等待键盘控制电路准备完毕 */
for (;;) {
if ((io_in8(PORT_KEYSTA) & KEYSTA_SEND_NOTREADY) == 0) {
break;
}
}
return;
/* 等待键盘控制电路准备完毕 */
for (;;) {
if ((io_in8(PORT_KEYSTA) & KEYSTA_SEND_NOTREADY) == 0) {
break;
}
}
return;
}

void init_keyboard(void)
{
/* 初始化键盘控制电路 */
wait_KBC_sendready();
io_out8(PORT_KEYCMD, KEYCMD_WRITE_MODE);
wait_KBC_sendready();
io_out8(PORT_KEYDAT, KBC_MODE);
return;
/* 初始化键盘控制电路 */
wait_KBC_sendready();
io_out8(PORT_KEYCMD, KEYCMD_WRITE_MODE);
wait_KBC_sendready();
io_out8(PORT_KEYDAT, KBC_MODE);
return;
}

#define KEYCMD_SENDTO_MOUSE 0xd4
#define MOUSECMD_ENABLE 0xf4
#define KEYCMD_SENDTO_MOUSE 0xd4
#define MOUSECMD_ENABLE 0xf4

void enable_mouse(void)
{
/* 激活鼠标 */
void enable_mouse(struct MOUSE_DEC *mdec){
/* 鼠标有效 */
wait_KBC_sendready();
io_out8(PORT_KEYCMD, KEYCMD_SENDTO_MOUSE);
wait_KBC_sendready();
io_out8(PORT_KEYDAT, MOUSECMD_ENABLE);
return; /* 顺利的话，键盘控制器会返回ACK(0xfa) */
}
/* 顺利的话，ACK(0xfa)会被送过来 */
mdec->phase = 0; /* 等待0xfa的阶段 */
return;
}

int mouse_decode(struct MOUSE_DEC *mdec, unsigned char dat){
if (mdec->phase == 0) {
/* 等待鼠标的0xfa的阶段 */
if (dat == 0xfa) {
mdec->phase = 1;
}
return 0;
}
if (mdec->phase == 1) {
/* 等待鼠标第一字节的阶段 */
mdec->buf[0] = dat;
mdec->phase = 2;
return 0;
}
if (mdec->phase == 2) {
/* 等待鼠标第二字节的阶段 */
mdec->buf[1] = dat;
mdec->phase = 3;
return 0;
}
if (mdec->phase == 3) {
/* 等待鼠标第二字节的阶段 */
mdec->buf[2] = dat;
mdec->phase = 1;
return 1;
}
/* 应该不可能到这里来 */
return -1;
}

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